linux-kernel - Re: [PATCH 1/2] treewide: fix memory corruptions when TASK_COMM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 23 Feb 2012 01:57:26 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: Re: [PATCH 1/2] treewide: fix memory corruptions when TASK_COMM_LEN
 != 16

On Thu, 23 Feb 2012 10:09:33 +0100 (CET) Jan Engelhardt <jengelh@...ozas.de> wrote:

> On Wednesday 2012-02-22 21:58, Andrew Morton wrote:
> 
> >On Wed, 22 Feb 2012 13:48:08 +0100 (CET)
> >Jan Engelhardt <jengelh@...ozas.de> wrote:
> >
> >> task: provide a larger task command buffer
> >
> ><scratches head>
> >
> >Why are we bothering ourselves about this?
> 
> Some prefer to know what's going on in the system. Every other or 
> so kernel release there are some new happy kthreads, such as
> 
> 24930 ?        S      0:00  \_ [btrfs-endio-1]
> 24931 ?        S      0:00  \_ [btrfs-endio-met]
> 24932 ?        S      0:00  \_ [btrfs-endio-met]
> 24933 ?        S      0:00  \_ [btrfs-endio-wri]
> 24934 ?        S      0:00  \_ [btrfs-freespace]
> 
> at which point one is curious to find out the rest of the met and why 
> there are two of them. If expanded one actually sees they are different 
> kthreads (rather than just per-cpu instances for a WQ, for example)
> 
> $ grep Name /proc/{29431,29432}/stat*
> /proc/29431/status:Name: btrfs-endio-meta-1
> /proc/29432/status:Name: btrfs-endio-meta-write-1
> 
> That's all.

doh.  The fix for that is to have less clueless btrfs developers.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/